mirror of https://github.com/poanetwork/quorum.git
99 lines
2.7 KiB
Go
99 lines
2.7 KiB
Go
// Copyright 2016 The go-ethereum Authors
|
|
// This file is part of go-ethereum.
|
|
//
|
|
// go-ethereum is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// go-ethereum is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package utils
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
|
|
"github.com/peterh/liner"
|
|
)
|
|
|
|
// Holds the stdin line reader.
|
|
// Only this reader may be used for input because it keeps
|
|
// an internal buffer.
|
|
var Stdin = newUserInputReader()
|
|
|
|
type userInputReader struct {
|
|
*liner.State
|
|
warned bool
|
|
supported bool
|
|
normalMode liner.ModeApplier
|
|
rawMode liner.ModeApplier
|
|
}
|
|
|
|
func newUserInputReader() *userInputReader {
|
|
r := new(userInputReader)
|
|
// Get the original mode before calling NewLiner.
|
|
// This is usually regular "cooked" mode where characters echo.
|
|
normalMode, _ := liner.TerminalMode()
|
|
// Turn on liner. It switches to raw mode.
|
|
r.State = liner.NewLiner()
|
|
rawMode, err := liner.TerminalMode()
|
|
if err != nil || !liner.TerminalSupported() {
|
|
r.supported = false
|
|
} else {
|
|
r.supported = true
|
|
r.normalMode = normalMode
|
|
r.rawMode = rawMode
|
|
// Switch back to normal mode while we're not prompting.
|
|
normalMode.ApplyMode()
|
|
}
|
|
return r
|
|
}
|
|
|
|
func (r *userInputReader) Prompt(prompt string) (string, error) {
|
|
if r.supported {
|
|
r.rawMode.ApplyMode()
|
|
defer r.normalMode.ApplyMode()
|
|
} else {
|
|
// liner tries to be smart about printing the prompt
|
|
// and doesn't print anything if input is redirected.
|
|
// Un-smart it by printing the prompt always.
|
|
fmt.Print(prompt)
|
|
prompt = ""
|
|
defer fmt.Println()
|
|
}
|
|
return r.State.Prompt(prompt)
|
|
}
|
|
|
|
func (r *userInputReader) PasswordPrompt(prompt string) (passwd string, err error) {
|
|
if r.supported {
|
|
r.rawMode.ApplyMode()
|
|
defer r.normalMode.ApplyMode()
|
|
return r.State.PasswordPrompt(prompt)
|
|
}
|
|
if !r.warned {
|
|
fmt.Println("!! Unsupported terminal, password will be echoed.")
|
|
r.warned = true
|
|
}
|
|
// Just as in Prompt, handle printing the prompt here instead of relying on liner.
|
|
fmt.Print(prompt)
|
|
passwd, err = r.State.Prompt("")
|
|
fmt.Println()
|
|
return passwd, err
|
|
}
|
|
|
|
func (r *userInputReader) ConfirmPrompt(prompt string) (bool, error) {
|
|
prompt = prompt + " [y/N] "
|
|
input, err := r.Prompt(prompt)
|
|
if len(input) > 0 && strings.ToUpper(input[:1]) == "Y" {
|
|
return true, nil
|
|
}
|
|
return false, err
|
|
}
|